<template>
	<view>
		<!-- 搜索区域 -->
		<!-- 使用自定义的my-search 组件 -->
		<!-- 如果需要改变搜索框的背景颜色，或者圆角 绑定:bgColor:"'someColor'"默认:#C00000 或者 :radius:"someNumber"默认：18 就可以了 -->
			<my-search @click="gotoSearch"></my-search>
		<view class="scroll-view-container">
			<!-- 左侧的滑动区域 -->
			<scroll-view class="left-scrool-view" scroll-y="true" :style="{height: wh +'px'}">
				<block  v-for="(item,i) in cateList" :key="i">	
				<view @click="activeChange(i)" :class="['left-scroll-view-item',i === active ? 'active' : '']">{{item.cat_name}}</view>
				</block>
			</scroll-view>
			<!-- 右侧的滑动区域 -->
			<scroll-view class="right-scrool-view" scroll-y="true" :style="{height: wh +'px'}" :scroll-top="scrollTop">
				<view class="cate-lv2" v-for="(item2,i2) in cateLevel2">
					<view class="cate-lv2-title">/ {{item2.cat_name}} /</view>
					<view class="cate-lv3-list">
						<view class="cate-lv3-item" v-for="(item3,i3) in item2.children" :key="i3" @click="gotoGoodsList(item3)">
							<!-- 三级图片 -->
							<image :src="item3.cat_icon.replace('dev','web')" mode="widthFix"></image>
							<!-- 文件名 -->
							<text>{{item3.cat_name}}</text>
						</view>
					</view>
						
				</view>
			</scroll-view>
		</view>
	</view>
</template>

<script>
	import badgeMix from '@/maxins/Badge-tabbar.js'
	export default {
		mixins:[badgeMix],
		data() {
			return {
				// 当前设备的可用高度
				wh : 0,
				// 分类列表
				cateList:[],
				// 二级分类列表
				cateLevel2:[],
				active:0,
				// 右侧滑动高度
				scrollTop:0
				
			};
		},
		onLoad() {
			const sysInfo = uni.getSystemInfoSync()	
			this.wh = sysInfo.windowHeight - 50
			// 调用分类列表数据
			this.getCateList()
		},
		methods:{
			async getCateList(){
				const res = await uni.$http.get('/api/public/v1/categories')
				if(res.data.meta.status !== 200) return uni.$showMsg()
				this.cateList = res.data.message
				// 二级分类
				this.cateLevel2 = res.data.message[0].children
			},
			activeChange(i){
				this.active = i
				// 重新为二级分类赋值
				this.cateLevel2 = this.cateList[i].children
				this.scrollTop = this.scrollTop === 1 ? 0 : 1
			},
			gotoGoodsList(item3){
				// 保留当前页面，且跳转到商品列表页面
				uni.navigateTo({
					url:"../../subpkg/goods_list/goods_list?cat_id="+item3.cat_id
				})
			},
			gotoSearch(){
				uni.navigateTo({
					url:"../../subpkg/search/search"
				})
			}
		}
	}
</script>

<style lang="scss">
.scroll-view-container{
	display: flex;
	.left-scrool-view{
		width: 120px;
	}
	.left-scroll-view-item{
		background-color: #F7F7F7;
		line-height: 60px;
		text-align: center;
		font-size: 12px;
		
		&.active{
			background-color: #FFFFFF;
			position: relative;
			
			&::before{
				content: ' ';
				display: block;
				width: 3px;
				height: 30px;
				background-color: #C00000;
				position: absolute;
				top: 50%;
				left: 0;
				transform: translateY(-50%);
				
			}
		}
	}
	.cate-lv2-title{
		font-size:12px;
		font-weight: bold;			
		text-align: center;
		padding: 15px 0;
	}
	.cate-lv3-list{
		display: flex;
		flex-direction: row;
		flex-wrap: wrap;
		
		.cate-lv3-item{
			width: 33.33%;
			margin-bottom: 10px;
			display: flex;
			flex-direction: column;
			// 下面两个css属性时为了剧中
			justify-content: center;
			align-items: center;
			
			image{
				width: 60px;
				height: 60px;
			}
			text{
				font-size: 12px;
				text-align: center;
			}
		}
	}
	
}
</style>
